Question

13.8g element consist 4.6 ×10^22 atoms what is atomic mass of element?​

Answer 1

~Solution :-

• Here, to find the atomic mass of element, we must;

We know that,

• 4.6 x $ \sf{10^{22}}$ atoms of an element weigh 13.8g.

Thus,

The atoms of $ \sf{ 6.02 \times 10^{13}}$ will weigh;

$= \sf{\frac{13.8 \times 6.02 \times {10}^{23} }{4.6 \times {10}^{22} } }$

$= \sf{180.6 \: g \: \: (molar \: mass)}$

• Hence, the molar mass (atomic mass) will be 180.6 g.

Answer 2

Explanation:

180

1 mole of any substance contains 6.02×10

23

atoms. Thus, 4.6×10

22

atoms corresponds to 0.0764 moles.

0.0764 moles weighs 13.8 g. Thus, 1 mole will weigh 180 g.